My table of Integrals has the general circumstance ##int frac dx x^two+a^2 ## as being a 'standard' integral also, not only the situation where by ##a=one##. But I do think this becoming a Calculus homework problem it is expected from the OP to determine how to make it happen. Hints https://gabletoppak.com/how-white-label-water-bottles-can-skyrocket-your-business/